Toshiba B-SX4T Series Specification page 255

Xfgggggggg: User block access password execution setting (Effective only when the
Explanation (1) The parameter, "Number of bytes to be read", is effective only when RFID read
mode is set to 1 or 3, as this parameter is intended for reading user data. When
reading tag ID, this parameter is ignored.
(2) When the value exceeding the maximum number of bytes storable in a tag is
designated for "Number of bytes to be read", a read error results.
(3) When the number of bytes to be read is omitted, the user data and the ID bytes of
the specified data bytes will be returned in accordance with the tag types, as
shown in the table below.
Hibiki tag is used for the B-SX704-RFID-U2-R.)
Designates a password to access and read a tag of which user block is
read-locked.
Up to five user blocks can be specified continuously.
For example: X4AABBCCDD,X5BBCCDDEE,X6CCDDEEFF
f: Designates a user area bank. (4 to 8)
4: Bank4 (User block 1)
5: Bank5 (User block 2)
6: Bank6 (User block 3)
7: Bank7 (User block 4)
8: Bank8 (User block 5)
gggggggg: User block access password
Fixed to 8-digit hexadecimal number
00000000 to FFFFFFFF
Tag type Number of user data bytes
EPC Class 0
EPC Class 1
Tag-it
I-Code
C220
C320
ISO15693
C210
C240
ISO18000-6B
EPC Class 1
Generation 2
Tag type
EPC Class 0
EPC Class 1
Tag-it
I-Code
C220
ISO15693
C210
C240
ISO18000-6B
EPC Class 1
Generation 2
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8 bytes
8 bytes
32 bytes
44 bytes
9 bytes
32 bytes
32 bytes
0 bytes
224 bytes
32 bytes
8 bytes
Number of ID bytes
12 bytes
8 bytes or 12 bytes
4 bytes
8 bytes
5 bytes
8 bytes
8 bytes
8 bytes
8 bytes
8 bytes or 12 bytes